
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
// 
//   http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

/**
 * AUTO-GENERATED FILE. DO NOT MODIFY.
 */

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
// 
//   http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
import { __extends } from 'tslib';
import Polyline from './Polyline.js';
import EffectLine from './EffectLine.js';
import * as vec2 from 'zrender/lib/core/vector.js';

var EffectPolyline =
/** @class */
function (_super) {
	__extends(EffectPolyline, _super);

	function EffectPolyline() {
		var _this = _super !== null && _super.apply(this, arguments) || this;

		_this._lastFrame = 0;
		_this._lastFramePercent = 0;
		return _this;
	} // Override

	EffectPolyline.prototype.createLine = function (lineData, idx, seriesScope) {
		return new Polyline(lineData, idx, seriesScope);
	};

	// Override

	EffectPolyline.prototype._updateAnimationPoints = function (symbol, points) {
		this._points = points;
		var accLenArr = [0];
		var len = 0;

		for (var i = 1; i < points.length; i++) {
			var p1 = points[i - 1];
			var p2 = points[i];
			len += vec2.dist(p1, p2);
			accLenArr.push(len);
		}

		if (len === 0) {
			this._length = 0;
			return;
		}

		for (var i = 0; i < accLenArr.length; i++) {
			accLenArr[i] /= len;
		}

		this._offsets = accLenArr;
		this._length = len;
	};

	// Override

	EffectPolyline.prototype._getLineLength = function () {
		return this._length;
	};

	// Override

	EffectPolyline.prototype._updateSymbolPosition = function (symbol) {
		var t = symbol.__t < 1 ? symbol.__t : 2 - symbol.__t;
		var points = this._points;
		var offsets = this._offsets;
		var len = points.length;

		if (!offsets) {
			// Has length 0
			return;
		}

		var lastFrame = this._lastFrame;
		var frame;

		if (t < this._lastFramePercent) {
			// Start from the next frame
			// PENDING start from lastFrame ?
			var start = Math.min(lastFrame + 1, len - 1);

			for (frame = start; frame >= 0; frame--) {
				if (offsets[frame] <= t) {
					break;
				}
			} // PENDING really need to do this ?

			frame = Math.min(frame, len - 2);
		} else {
			for (frame = lastFrame; frame < len; frame++) {
				if (offsets[frame] > t) {
					break;
				}
			}

			frame = Math.min(frame - 1, len - 2);
		}

		var p = (t - offsets[frame]) / (offsets[frame + 1] - offsets[frame]);
		var p0 = points[frame];
		var p1 = points[frame + 1];
		symbol.x = p0[0] * (1 - p) + p * p1[0];
		symbol.y = p0[1] * (1 - p) + p * p1[1];
		var tx = symbol.__t < 1 ? p1[0] - p0[0] : p0[0] - p1[0];
		var ty = symbol.__t < 1 ? p1[1] - p0[1] : p0[1] - p1[1];
		symbol.rotation = -Math.atan2(ty, tx) - Math.PI / 2;
		this._lastFrame = frame;
		this._lastFramePercent = t;
		symbol.ignore = false;
	};
  
	return EffectPolyline;
}(EffectLine);

export default EffectPolyline;